"Congradulations on Baby #3," Khloe Kardashian's on-again, off-again flame French Montana wrote in the card to Scott Disick and Kourtney Kardashian -- check it out. Credit: Alexander Tamargo/Getty Images; Inset: Kevin Mazur/BET/Getty Images for BET

That's quite the card there, French! Kourtney Kardashian and Scott Disick received a sweet message from family friend French Montana — also known as Khloe Kardashian's perpetually on-again, off-again beau — after the couple welcomed their third child, a baby boy, this past Sunday, Dec. 14.

Proud papa Disick, 31, shared a photo of the Cocaine Mafia rapper's kind message, captioning his Instagram pic: "Classic thanks @frenchmontana."

The handwritten card reads: "Congradulations on Baby #3. I wish u could have named him 'Haann' or 'Daddy.' I wish you all the blessings in the world!" (As seen in the card below, the "congradulations" was misspelled.)

Interestingly enough, he signed his card as "Love, Uncle French."

While French and Khloe remain broken up, the rapper grew close to Disick this past summer as the stars filmed their Keeping Up With the Kardashians spinoff series in the Hamptons. Kardashian family members were also on hand to celebrate Montana's 30th birthday last month, where Khloe and French appeared to briefly rekindle their romance.

Classic thanks @frenchmontana

A photo posted by Lord Disick (@letthelordbewithyou) on Dec 12, 2014 at 8:42pm PST

Kourtney and Scott coincidentally welcomed their newborn on the same day as eldest son Mason's birthday. While Kourtney was in the hospital giving birth, her younger sister Kim stepped in her place and took Mason to see Disney on Ice for his fifth birthday.